Integrated control method and integrated controller of powertrain

Abstract

An integrated controller of a powertrain of a vehicle and a control method thereof, to determine an optimum shifting stage of the vehicle, may include a cost function having a driving distance per fuel consumption amount obtained through the simulation of a vehicle model by use of the demand power of the engine as an input value, wherein an optimum shifting stage is determined using the cost function to control an engine throttle in addition to controlling a transmission based on the optimum shifting stage.

Description

CROSS-REFERENCE(S) TO RELATED APPLICATIONS[0001]The present application claims priority to Korean Patent Application No. 10-2018-0034644, filed on Mar. 26, 2018, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE DISCLOSUREField of the Disclosure[0002]The present invention relates to an integrated control method and an integrated controller of a powertrain, and more particularly, to an integrated control method and an integrated controller that enhances fuel efficiency and drivability through an integrated control of a powertrain including an engine and an automatic transmission.Description of Related Art[0003]Generally, a powertrain independently controls an engine and a transmission depending upon an acceleration pedal input of a driver. However, according to the advancement of engine technology and the multi-stages of the transmission, control complexity of the powertrain increases, and thereby it is difficult to optimize the ...

AI Technical Summary

Benefits of technology

The present invention provides an integrated control method and controller for vehicles that enhances fuel efficiency and drivability by optimizing shifting stages based on computed fuel efficiency and drivability values, rather than relying on traditional shifting maps. This allows for shifting that is more efficient based on the vehicle's current driving state, improving fuel efficiency while still maintaining a comfortable driving experience. The method and controller also convert the driver's intent into the engine's demand power, ensuring optimal engine and transmission control for improved drivability.

Problems solved by technology

However, according to the advancement of engine technology and the multi-stages of the transmission, control complexity of the powertrain increases, and thereby it is difficult to optimize the performance of the entire vehicle rather than the performance of each part.

And, to enhance fuel efficiency, even at the stage when a vehicle speed is low, the engine RPM may be suppressed by shifting to a higher gear stage, but the method cannot cope with the circumstances, for example, a change in road surface inclination, an accel operation of a driver, etc., and the shifting to a low gear stage is performed immediately to reduce the drivability by frequently perform the shifting in the present procedure.

However, the methods perform the shifting considering only the transmission, such that it is possible to give the driver a sense of heterogeneity due to the influence of the engine, and intervention by the driver is required to maintain the same engine output.

However, even when the same output of the engine is produced, the driving distance may be changed depending upon the configuration such as a gear stage number and a reduction gear, such that there is the limitation to enhance the fuel efficiency of the entire vehicle based on the braking fuel consumption rate.

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